the suspects were apprehended. >> yeah. there is been some conflicts in this.nbc'spetewilliamsconfirmedthat at least one of them was spotted and is believed to be a pressure cooker-type bomb, a pressure cooker from your standard kitchen filled with some sort of powder and perhaps projectiles. at other times, they were described as having something like grenades or improvised explosives. i've seen some reports in the last few minutes that there are believed to be undetonated explosive devices in the watertown area. that's why they're trying to get people as far away as possible. >> chris, thank you very much. we'll have more from nbc news's chris palone in the program. a quick check off markets for you. global markets are taking these event necessary stride. we know very little still about the motives, about these suspects, beyond the fact that one has been skilled and the other is on the run and authorities are trying, of course, to resolve this situation there. we'll be right back. stay with us here on "worldwide exchange." >>> welcome to "worldwide exchange." a manhunt is under way f

thatpetewilliamsfromnbc news was insistent all the way through, that his law enforcement sources, which, of course, are impeccable were saying that there was not a suspect in custody. what was going on yesterday and what continues to go on today is that authorities have pored through the video and pictures have been coming in over the last three days trying to pinpoint exactly where those two packages were placed before they went off. now, authorities do acknowledge to nbc news that they have identified by sight a person who is seen placing either a backpack or a duffel bag on to the ground in the place where the second bomb went off in the moments leading up to that explosion. however, according to nbc news, that person has not been identified by name. they just see him on the tape and are working to identify him. he certainly has not been arrested or put into custody. police continue their work today to try to figure out exactly who that person is. last night, the fbi was planning to have one of their twice daily media briefings around 8:00 local time. that was canceled. and so we're